Hot die for plastic molding



I Patented Oct. 2, 1923.

' UNITED STATES PAT EDWIN M. WINTER, 0F BROOKLYN, NEW YORK.

HOT 'DIE FOR PLASTIC MOLDING.

Applicatioii filed August 12, 1921. Serial No. 491,720.

To a whom. it may concern: I

'Be it known that I, EDWIN M. WINTER, a citizen of the United States,residin in Brooklyn. in the county of Kings and tate of New York, haveinvented certain new and useful Improvements in Hot Dies for PlasticMolding, of which the following is a specification.

My present invention relates to improvements in pressure platens for hotmolding presses of various types, and is preferably adapted for moldingphonograph r cords.

Ordinarily this device is used in toggle and hydraulic presses ofthewell known type for plastic molding, wherein the material is firstheated to mold it and is then chilled by the introduction of coolingmedium.

One feature of my invention is the making of a platen of the classdescribed wherein a heat distributing means ordinarily associated withsaid platen is made integral with the platen itself, and thereby becomesmore efficient in the conducting of heat through the material to bemolded, and in thereafter cooling off such molded material for removingfrom the press.

Another feature is the making of this heat distributing means of sinuousor winding form, whereby a large'amount of hot or cold medium may beextensively conducted and the heat or cold thereof extensivelydistributed through the body of the platen, and whereby the materialunder treatment may be subjected to rapid changes of temperature.

In the accompanying drawings which form part of this specification,Figure 1 is a plan view of one form of my invention.

Figure 2 is a' sectional view on the line 2-2 of Fig. 1.

Figure 3 is a fragmentary detail view, on an enlarged scale, of aportion of the platen as shown in Fig. 2, for the purpose of showingmore fully the hot and cold medium conducting means in cross section.

Figure 4 is a plan View of another form of my invention.

Figure 5, is a sectional view on the line 5-5 of Fig. 4.

Figure 6, is a fragmentary detail view, on an enlarged scale, bearingthe same relation to Fig. 5 that Fig. 3 bears to Fig. 2.

Similar letters or numerals denote similar parts throughout the severalviews.

My invention comprises the body or-plate or cold medium conducting Thehot or cold medium conducting means B is metal tubing, preferably steeltubing, and preferably of oval shape in cross section as affording moreextended surface for radiation of heat or cold than round tubing. Thistubing is arranged within the confines of the central circular portion11 as a coil having port ends 15 and 16, the coil beginning at the portend 15 and continuing as a continuous winding to a point, such as 17,near the center or hub 18 of the central circular portion 11 and thenbeing extended as a straight piece to the port end 16, the coil oftubing, when the body A is molded, being tinned and placed in positionin the central portion 11 and molten iron poured therearound, therebycausing in a well known manner amalgamation of the coil and body A, thecoil becoming integral with the body A and located therein with the-portends 16 and 17 extending through the side wall or edge thereof andadjacent to each other for accessibility. It is thus seen that a meansfor conductin vided which is located within or enclosed hot or coldmedium is pro- I by the body A and is part thereof, and is adapted fordisseminating the heat or cold through'the body A by radiation and whichdue to its sinuosity or winding distributes the heat or cold extensivelythroughout the body A for transmission to the material or articletreated. A

In the form of my invention shown in Fig. 4, the coil ofsteel tubing 19is arranged a introduced at one port end of the coil and is ejected fromthe otherport end, it being immaterial which port end is used foradmission or ejection, the hot or cold medium being quickly conducted bythe coil through the body of the platen, the heat or cold beingextensively distributed by radiation from the coil and transmitted fromthe platen to the material or article treated, and a means for effectinga quick change of temperature by changing from a hot to a cold mediumand application thereof to the material or article treated is afforded.

Having thus described my invention it should be understood that theremay be modifications thereof and variations therein without departingfrom the spirit of the invention or exceeding the scope of the appendedclaims.

What I claim and desire to protect by Letters Patent is 1. A platenhaving a flat coil of metal tubing enclosed by the material of the bodyof the platen for distributing hot or cold medium through said body;said coil extending through the body of the platen from near the edgethereof to near the central point of said body on a plane parallel tothe plane of the surface of said body and having means for inlet oroutlet of said medium.

2. A platen of disk form having a flat coil of metal tubing enclosed bythe material of the body of the platen for distributing hot or coldmedium through said body;

said coil extending through the body of the platen from near the edgethereof to near the center of said body on a plane parallel to the planeof the surface of said body and having means for inlet or outlet of saidmedium.

3. A platen having a flat coil of steel tubing enclosed by the materialof the body of the platen for distributing hot or cold medium throughsaid body; said coil extending through the body of the platen from nearthe edge thereof to near the central point of said body on a planeparallel to the lane of the surface of said body and being provided withmeans for inlet or outlet .of said medium.

4:. A platen of disk form having a flat weave? 'platen from near theedge thereof to near the center of said body on a plane parallel toJtheplane of the surface of said body and being provided with means forinlet or outlet of said medium.

5. A platen of cast metal having a flat coil of tinned steel tubingenclosed by and amalgamated with the material of the body of the platenfor distributing hot or cold medium through said body; said coilextending through the bod of the platen from near the edge thereo tonear the central point of said body on a plane parallel to the plane ofthe surface of said body and .being provided with means for inlet oroutlet of said medium.

6. A platen of cast metal of disk form having a flat coil of tinnedsteel tubingen closed by and amalgamated with the material of the bodyof the platen for distributing hot or cold medium through said body;said coil extending through the body of the platen from near the edgethereof to near the center of the body on a plane parallel to the planeof the surface of said body and, being provided with means for inlet oroutlet of said medium.

7. A platen having a coil of metal tubing therein for conducting hot orcold medium through the platen and for extensively distributing heat orcold thro h the platen by radiation from said coil; t e' tubing beingoval in cross section.

8. A laten of cast metal having a coil of steel tu ing enclosed by andamalgamated with the material of the body ofthe platen for distributinghot or cold medium through said body; the tubing being oval incrosssection. I

' EDWIN M. bl-TEE. 'Witnesses: 1

Grams S. Wmmaiue, H. D. PENNEY.

